drjch wrote:I guess my main reason for wanting a double boiler is from what i am gathering the hx machines take a lot longer time to produce the foam for lattes and caps.
Uh, no.
What takes a long time to steam is a Single Boiler/Dual Use (SB/DU) machine, because the boiler must switch back-and-forth from "brew temperature" to "steam temperature." A Heat Exchanger (HX) machine is
always at steam temperature, so you have
lots of steam power (how much depends upon the size of the boiler, the setting of the pressurestat, and how may shots you've just pulled. A Double Boiler (DB) machine has two separate boilers (d'oh!), one set for brewing and the other for steaming.
There is no difference between HX and DB machines of equal quality in terms of what you get in the cup.
drjch wrote:I also hear what you are saying about the grinder, and I am going to heed your advice, but it seems odd to me that the grinder has that much of a influence on good espresso.
OK, think of the machine itself as a car. It will get you from here to there. In fact,
any car -- as long as it's in working order -- is capable of getting you from here to there. (Bear with me, I'm making this up off the top of my head.) Think of the grinder as the engine -- without it, you're going nowhere (pre-ground, stale coffee); with it, you might be going 0-60 in 25 seconds, or in 6.2 seconds (depending upon the quality of the grinder). It all depends. (Think of the coffee as -- what? -- the tires, affecting the comfort, the cornering, etc. of the ride.)
In Italian, the "Four M's of Espresso" translate to the espresso machine, the grinder/grind, the beans themselves, and the hand of the operator. Personal opinion:
all are important, but I find these to be listed in an ever-increasing order of importance.
Cheers,
Jason